The golf is really doing my head in now. Im driving it like a gran, using millers diesel power plus, injector cleaner, cleaned the MAF, and still im getting poor MPG. Like 40mpg and its dropping FAST. im currently getting 35mpg, where i used to get 47mpg+!!! No performance has been lost though?! Plant my right foot and it goes like a train, but then the MPG drop VERY low. Whats going on? MODS: REVO, Carbonio CAI, custom made back box. Any help much appreciated.